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So I have a 2003 Jeep Wrangler. Has 54k on it, I bought it about 3 years ago. I've had to fill it up with coolant twice now from the couldn't reservoir. I'm not seeing any leaks anywhere, not seeing any milky residue in my oil, I do smell something like coolant or something burning after driving it for a while. I've been told it may be a blow head gasket or cracked head, like I said I'm not seeing any coolant in my oil. Trying to find the solution so I can fix myself, thanks!
 

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So I have a 2003 Jeep Wrangler. Has 54k on it, I bought it about 3 years ago. I've had to fill it up with coolant twice now from the couldn't reservoir. I'm not seeing any leaks anywhere, not seeing any milky residue in my oil, I do smell something like coolant or something burning after driving it for a while. I've been told it may be a blow head gasket or cracked head, like I said I'm not seeing any coolant in my oil. Trying to find the solution so I can fix myself, thanks!
If it doesn't overheat, just let it run ant look for the leak. is the smell inside or outside?
 

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Check the heater coil if you are getting the odor inside. Had one that would blow fog out the vents with the heat on had to replace the heater coil.
 

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So I have a 2003 Jeep Wrangler. Has 54k on it, I bought it about 3 years ago. I've had to fill it up with coolant twice now from the couldn't reservoir. I'm not seeing any leaks anywhere, not seeing any milky residue in my oil, I do smell something like coolant or something burning after driving it for a while. I've been told it may be a blow head gasket or cracked head, like I said I'm not seeing any coolant in my oil. Trying to find the solution so I can fix myself, thanks!
Sounds like a blown head gasket since it's not leaking on the ground.
 

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I had the same issue. Mysterious disappearing coolant with no leaks or any sign of leaks under the hood or on the driveway. I kept adding coolant and driving it and it ran great until the oil pressure started dropping to zero at idle. I put a remanufactured engine in it which solved both problems. It was probably a leaking head gasket or cracked head and if I had dealt with it, maybe I wouldn't have had to put an engine in it.
 

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I had a 99 Chev. Z-71 with a 5.3 that did that since the day it was new. I would add coolant about every 5-9 thousand miles. It is still running fine at 235,000 miles. I can just slightly smell the coolant through the exhaust.
 

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I had the same problem, rented the tester showed nothing was wrong. No milky oil, no visible leaks. Had a shop replace head gasket just for hell of it, jeep had 160xxx miles on it. When they took head off they found several hair line cracks in the head.
 
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